Malicious PDF — malware analysis report

Static analysis result for SHA-256 965b7eba9f0450c5…

MALICIOUS

PDF

97.9 KB Created: 2021-07-04 12:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 83d7ab5c72581f4269665433c8384635 SHA-1: 2d59f143ab705ae6ef614c5d10a6cc60a642a2aa SHA-256: 965b7eba9f0450c5c5c291249b645bbb83d267a760a44115bacd88f3d0247e56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely exploits a vulnerability or serves as a phishing lure. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it's designed to redirect users to malicious content or download further payloads. The presence of multiple external URIs and link farms points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://smidgel.ru/uplcv?utm_term=how+to+use+hypnosis+on+someone PDF link annotation
    • http://davidhammerstein.org/userfiles/file/88237394578.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd2e71fc4a---wufareruk.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f2ff4c552---63156349129.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/31196327579.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c19388ff1---8537701907.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/78900178403.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210618223053.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/a8494e843853855de4e477d971fa3975/bofesago.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d23db0c5b44---95584937022.pdfIn PDF document text
    • http://angelofthewinds.net/ckfinder/userfiles/files/sonubonavuge.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/p62pdolo2moel2cpof1gfdb88f/wodopogedanugiwenez.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021062802184849.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b32194afe1---98809859149.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/89291240669.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/061c80f09bdbb5e76da0ea4cdf05b94a/43996607031.pdfIn PDF document text
    • http://paynechapelduquesne.org/clients/9/9b/9b910c66cef3ae2d1bb1fd5804160a19/File/vitajitudezetiduzofawo.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5043cb0256117aca4f16e63f2b0fa3ee/3343402049.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f39b5bb828---gatoxixuw.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b9fa22b9b---22706903279.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/godevizowabot.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd115b39ce---71224286291.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/jugavaxizofizanufimavan.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/2635799318.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a79d09b9f871b5f19c44546a0caefcb/97166150566.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000134ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AD 17644 bytes
SHA-256: d08f6c50ee53978fbb7adc976240502b725f7f60aeb927d0bd8aff3c37d99694
font_02_sfnt_off0001626a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1626A 10500 bytes
SHA-256: 45680c736d0a506f1980a2da1f73cc65e0dbb0c4b3e1695071bcdf6c6beb9ab7